And whether he wins or losses then he can proceed to the weighing down and another division that he may want to dominate before he entirely retires for it.
The reason why Donaire considers moving down weight is that no chance at all to take a title shot at the Bantamweight as Inoue is really a monster.
Since Inoue moved up, Donaire shifted gears and accept the mandatory bout for the vacant WBC Bantamweight title as a Rank 2 contender.
Donaire doesn't experience much big trouble in keeping up with the required weight in his entire boxing career. Regardless if he will fight on Super Lightweight or stay in Bantamweight, no problem at all regarding weight.
Yes, he might not have a problem, but it can pose a threat to his body as he is not getting any younger. But it's better for him to stay at 118 lbs, I think this weight is perfect for him. We have seen him knocking out his opponents and even goes to the finals with Inoue at the WBSS tournament. But I do agree that he target 115 lbs because Inoue has beaten him. And now that Inoue moves up, Donaire should be fine with this division again and could be the champion next if ever he beats Moloney.
At his age now, he has to stay at the weight that he is most comfortable with. This will be his last attempt to become a champion again, and I believe he will not stay long defending the title as he is not getting any younger, it will be pride for him that he will retire as a champion. Of course not only him but for the Filipinos that are following and supporting his career as a boxer.